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- Question
Most viruses that infect plants possess
Options- A. single-stranded DNA
- B. single-stranded RNA
- C. double-stranded DNA and RNA
- D. double-stranded RNA only
- Correct Answer
- single-stranded RNA
ExplanationGenerally viruses that infect plants have single stranded RNA. Viruses infecting animals have double stranded RNA or DNA. Viruses which infect bacteria have double stranded DNA.
- 1. The highest average salinity amongst the following seas is reported from
Options- A. Dead Sea
- B. Red Sea
- C. Black Sea
- D. Mediterranean Sea Discuss
- 2. The hot, dry wind on the east or leeward side of the Rocky mountains (North America) is called
Options- A. the Chinook
- B. the Sirocco
- C. the Harmattan
- D. the Loo Discuss
- 3. The objective of the Morley-Minto Reforms was
Options- A. extension of provincial assemblies
- B. to give more powers to local government
- C. to abolish the post of secretary of the state for India
- D. to establish diarchy in provinces Discuss
- 4. Who developed Yahoo?
Options- A. Dennis Ritchie & Ken Thompson
- B. David Filo & Jerry Yang
- C. Vint Cerf & Robert Kahn
- D. Steve Case & Jeff Bezos Discuss
- 5. The Rhine river of northern Europe empties into
Options- A. the Baltic sea
- B. the North sea
- C. the Bay of Biscay
- D. the Adriatic sea Discuss
- 6. The main period of Mesozoic era include
Options- A. Triassic period and Cretaceous period
- B. Jurassic period and Triassic period
- C. Triassic period, Jurassic period and cretaceous period
- D. cretaceous period and Jurassic period Discuss
- 7. Name the terminals of a BJT.
Options- A. Drain, Gate, Source
- B. Positive, Negative, Neutral
- C. Anode, Cathode, Triode
- D. Emitter, Base, Collector Discuss
- 8. The spring season in the north temperate zone is when
Options- A. the sun is directly overhead the equator
- B. the sun is directly overhead the Tropic of Cancer
- C. the sun returns to equator
- D. the sun is at the Tropic of Cancer Discuss
- 9. The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of
Options- A. bromine
- B. fluorine
- C. chlorine
- D. sulphur Discuss
- 10. Pakistan which rejoined the Commonwealth, had pulled itself out of it in the year
Options- A. 1978
- B. 1975
- C. 1972
- D. 1982 Discuss
More questions
Correct Answer: Dead Sea
Correct Answer: the Chinook
Correct Answer: extension of provincial assemblies
Correct Answer: David Filo & Jerry Yang
Correct Answer: the North sea
Correct Answer: Triassic period, Jurassic period and cretaceous period
Correct Answer: Emitter, Base, Collector
Correct Answer: the sun is directly overhead the equator
Correct Answer: sulphur
Correct Answer: 1972
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